In the present study, the influence of bed slope on the hydrodynamic performance of a floating oscillating water column (OWC) device is investigated. Numerical computations are performed using the incompressible multiphase volume of fluid (VOF) approach. A dynamic meshing technique is adapted to capture the body motions for different wave conditions. The flow phenomena as well as the free surface elevations are investigated for the OWC device considering a range of wave periods. The results of this study indicate that the hydrodynamic capture efficiency for the floating OWC device may be significantly higher with a sloping bed. However, the dependence on the slope is observed to vary with the time period of the incident wave. This study should be applicable to wave energy converter devices installed near shore, where the presence of sloping bed has an influence on the hydrodynamic behaviour and hence the capture efficiency.

在本研究中，研究了床斜率对浮动振荡水柱（OWC）装置的水动力性能的影响。使用不可压缩的多相流体体积（VOF）方法进行数值计算。动态网格划分技术适用于捕获不同波浪条件下的人体运动。考虑了一系列波周期，对OWC设备的流动现象以及自由表面标高进行了研究。这项研究的结果表明，使用倾斜床时，浮动OWC设备的水动力捕获效率可能会明显更高。然而，观察到对斜率的依赖性随入射波的时间周期而变化。该研究应适用于在岸边安装的波能转换器设备，